Motor.



PATENTED MAR. 5. 1907.

s. J. EVANS.

MOTOR. APPLICATION FILED we. 26. 1905.

UNITED STATES PATENT OFFICE.

MOTOR.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed August 26,1905. Serial No. 275,885.

T0 at whom it may concern.-

Be it known that I, SAMUEL J. EVANS, a citizen of the United States, and a resident of Bluefield, in the county ofMercer and State of West Virginia, have invented a new and Im proved Motor, of which the following is a full, clear, and exact description.

My invention relates to motors, and has for its object to provide a motor which is simple, cheap, and efficient in operation, and one in which the water of condensation is drained off without the use of cocks.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation, partly in section, of the improvement, the section being on line 1 1 of Fig.2. Fig.2 is a front view, partly in section, and on a smaller scale; and Figs. 3, 4, and 5 are diagrammatic sectional views of the valve-chamber and valve, Fig. 3 illustrating the valve out of operation or in a position of rest, Fig. 4 in positive lines illustrating the valve in position to force the Working piston upward and in dotted lines in position to force said working piston down- Ward, and Fig. 5 illustrates the position of the valve when the cylinder containing the working piston is to be drained.

A pedestal C, preferably of skeleton construction and having a flat top, is secured in any approved manner upon the cross-beams a and on this pedestal C the lower open end of a cylinder 0 is bolted or otherwise secured in a steam-tight manner, the cylinder being closed at its upper end by a suitable head 19. A piston 20 is mounted to slide in the cylinder 0, and this piston is provided with a rod 21, which passes through an opening in the central portion of the pedestal C and through a stuffing-box 22, provided at said point.

A valve-chamber D is formed preferably integral with the pedestal C at one side just below the cylinder 0, and integral with the lower portion of the said valve-chamber D an exhaust-chamber 27 is produced, which exhaust-chamber is provided with ports 28 and 29, leading into the end portions of the valvechamber. The ports 28 and 29 are preferably connected with a single pipe 30, which conducts the exhaust wherever desired. At the same side of the valve-chamber a pipe 31, adapted to carry live steam, is introduced into the said valve-casing about centrally between the exhaust-ports 28 and 29. Two ports 32 and 33 are located at the opposite side of the valve chamber or casing D. The port 32, which is located adjacent to one end of the valve-casing but is not in registry with the opposing exhaust-port 28, connects with the cylinder C at its bottom, as is best shown in Fig. 2, and the other port 33 is in communication with the valve-chamber near its opposite end but out of alinement with the opposing exhaust-port 29. This latter port 33 is connected with a passage-way 34, erected upon the exterior of the cylinder C, and this passage-way 34 is closed except where it connects with the port 33 and at its upper portion with the upper part of the cylinder 0, which latter connection is effected by producing a suitable opening 35 in the said cylinder, as is shown in Fig. 1. Thus the port 32 supplies steam to the bottom of the piston to raise the same, and the port 33 supplies steam above the piston to lower the same.

The valve D, as shown in Figs. 3, 4, and 5, is practically a piston-valve and is provided with an annular centrally-located groove d for the passage of steam. The position of the valve D relative to the ports above described is shown in Figs. 3, 4, and 5, in Fig. 3 the valve being shown in a cut-off position and steam being prevented from entering either of the supply-ports 32 and 33, whereas in Fig. 4 the valve is shown by full lines in a position to receive steam and to conduct the said steam to the upper ports 33 and 34, exhausting at the port 28 and by dotted lines the valve is shown as receiving steam and conducting itto the lower port 32.

The valve D is provided with a rod cl, which extends out from the forward end of the valve-chamber through a suitable stuifing-box 34 and this rod (1 is pivotally connected with a lever 35, pivotally attached at its upper end to a bracket 36, extending out from a beam 0. The lower or handle por tion of the lever 35 is mounted to slide in engagement with a guide-bar 37,- suitably supported at its inner end. This guide-bar is engaged by a thumb-latch 38. A in 39 is removably located at the outer end of the guide-bar 37, and when the lever 35 is at the inside of this pin the said lever can be moved only sufficiently to carry the valve D a suitable distance forward and rearward to cause the piston to ascend or descend a proper distance. When, however, it is desired to drain the cylinder and the valve-chamber, the pin 39 is removed, and the lever 35 is carried out to the dotted position shown in Fig. 1,

and the pin is then replaced, holding the lever in its new position. When the lever is in its extreme outer position, the valve D is carried to the extreme forward end of the valve-casing D, as shown in Fig. 5, wherein both eX- haust-ports are open and both steam-ports to the cylinder and the port which supplies live steam to the valve-chamber is likewise opened, thus permitting a perfect drainage and likewise permitting the cylinder being blown out, which is generally done just prior to commencing operations.

In the ordinary operation of the valve it is evident that by moving it in either direction from the center steam is admitted alternately to each end of the cylinder and exhausted at opposite ends. The object of placing the valve D at the lower end of the cylinder 0 and the exhaust below the valve is for the pur 3086 of draining the water or moisture resuiting from condensation without the aid of cylinder-cocks as the places in which the devices are adapted to work are opened and the liability of freezing in the winter is great.

It will be observed that by introducing steam into the upper end of the cylinder in the mannershown and described a cushion for the piston is obtained at the upper end of .the stroke, thereby preventing the piston from striking the cylinder-head.

The port 35 enters the cylinder G some distance below the top, thereby producing a space above the port, and as soon as the piston passes this port a compression commences, producing the cushioning referred to. As soon as the steam is released at the lower side of the )iston the said compression, combined with t 1e weight of the gate, starts the piston downward.

I desire it to be understood that air may be employed as a motive fluid instead of steam, if desired.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a motor, a pedestal formed with a valve-ehamber, and an exhaust-chamber, the valve-chamber having in one side feedports, one at each side of the center of length of the chamber, and in the opposite side at its center a supply-pipe, and the exhaust-chamber having ports leading into the ends of the valve-chamber out of register with the feedports, a piston-valve in the valve-chamber and having an annular centrally-located groove, means for operating the valve, a cylinder having its open lower end secured upon the pedestal and into which opens one of the feed-ports of the valve-chamber, the cylinder being provided with a passage-way leading from its upper end to the other feed-port of the said valve-chamber, and a piston in said cylinder.

2. In a motor, a cylinder, a piston within the cylinder provided with a rod extending out therefrom, a valve-chamber below the cylinder, an exhaustchamber below the valve-chamber, feed-ports extending from the valve-chamber to the top and bottom portions of the cylinder, ports connecting the exhaust-chamber with the valve-cham her, which ports enter the valve-chamber near its ends and at the sides opposite to that provided with the feed-ports, a supply-pipe which enters the said steam-chamber at the same side at which the exhaust-ports enter and at a point between said exhaust-ports, a grooved piston-valve mounted to slide in the said chamber, and means for manually operating and controlling the said valve.

3. In a motor, a cylinder, a piston within the cylinder provided with a rod extending out therefrom, a valve-chamber located be low the said piston, an exhaust-chamber located below the valve-chamber, a steam-feed port leading from the valve-chamber to the bottom portion of the cylinder, a second steam-feed port also leading from the valvechamber to the upper portion of the cylinder, entering said cylinder a predetermined distance below its head, orts connecting the exhaust-chamber with t e valve-chamber at the side opposite that containing the feedports, a discharge for the said exhaust-chamber, a steam-supply pipe which leads into the valve-chamber at a point between the eX- haust-ports, a grooved piston-valve mounted to slide in the valve-chamber, and means for operating and regulating the throw of the said valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' SAMUEL J. EVANS.

WVitnesses CHARLES CLARENCE PATTISON, WILLIAM ROY PORTIS. 

